Carmex 16IR11.5NPTBXC Threading Insert 11.5 Tpi Npt Carbide

Product Description

The CARMEX 16IR11.5NPTBXC is a solid carbide laydown threading insert designed for cutting internal NPT threads on a lathe or CNC turning center. It produces right-hand internal threads at 11.5 threads per inch, conforming to the NPT standard taper pipe thread form with a 30-degree included angle. The insert carries a PVD-applied TiN finish in the BXC manufacturer grade, providing wear resistance across a broad range of workpiece materials. With a 3/8-inch inscribed circle and a thickness of 0.146 inches, this is a 16IR-style insert intended for use in compatible 16IR toolholders. Installation is performed by machinists and CNC operators in precision machining environments.

This insert is suited for threading operations on pipe fittings, fluid-system components, and any workpiece requiring a standard NPT internal taper thread. The universal primary workpiece material rating means it is applicable across carbon steels, stainless steels, cast iron, non-ferrous alloys, high-temperature alloys, and plastics, covering material codes H, K, M, N, P, and S. It is appropriate for both production threading runs and job-shop single-piece applications where consistent thread form and insert repeatability are required.

Key Features

• Solid carbide construction with PVD TiN coating for extended tool life
• 11.5 TPI at 30-degree included angle, conforming to NPT internal thread standard
• Right-hand cut, 16IR insert style for use in standard 16IR toolholders
• 3/8-inch inscribed circle, 0.146-inch thickness
• Universal material compatibility: carbon steel, stainless, cast iron, non-ferrous, high-temp alloys, and plastics
• Manufactured to CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in 16IR-style threading toolholders that accept laydown inserts with a 3/8-inch inscribed circle. Consult your toolholder documentation to confirm seat geometry and clamping compatibility before installation.

Installation Notes

Insert replacement and seating should be performed by a qualified machinist or CNC operator with the machine in a locked-out, zero-energy state before any tooling change. Ensure the insert pocket and clamping surfaces are clean and free of chips before seating the insert. Verify thread pitch and hand orientation against the workpiece drawing before commencing the threading cycle. Refer to the toolholder manufacturer specifications for recommended clamping torque and insert indexing procedure.